import logging
from logging.handlers import RotatingFileHandler

from flask import Flask
# 可以用来指定 session 保存的位置
from flask import g
from flask import render_template
from flask.ext.session import Session
from flask.ext.sqlalchemy import SQLAlchemy
from flask.ext.wtf import CSRFProtect
from flask.ext.wtf.csrf import generate_csrf
from redis import StrictRedis

from config import config


db = SQLAlchemy()
redis_store: StrictRedis = None


def setup_log(config_name):
    # 设置日志的记录等级
    logging.basicConfig(level=config[config_name].DEBUG)  # 调试debug级
    # 创建日志记录器，指明日志保存的路径、每个日志文件的最大大小、保存的日志文件个数上限
    file_log_handler = RotatingFileHandler("logs/log", maxBytes=1024 * 1024 * 100, backupCount=10)
    # 创建日志记录的格式 日志等级 输入日志信息的文件名 行数 日志信息
    formatter = logging.Formatter('%(levelname)s %(filename)s:%(lineno)d %(message)s')
    # 为刚创建的日志记录器设置日志记录格式
    file_log_handler.setFormatter(formatter)
    # 为全局的日志工具对象（flask app使用的）添加日志记录器
    logging.getLogger().addHandler(file_log_handler)


def create_app(config_name):
    global db, redis_store
    Config = config['test']
    
    setup_log(config_name)
    app = Flask(__name__)
    app.config.from_object(Config)
    
    # 初始化数据库
    db.init_app(app)
    # db = SQLAlchemy(app)
    redis_store = StrictRedis(host=Config.REDIS_HOST, port=Config.REDIS_PORT,decode_responses=True)
    CSRFProtect(app)
    Session(app)

    from info.utils.common import do_index_class
    app.add_template_filter(do_index_class,"indexClass")

    from info.utils.common import user_login_data

    @app.errorhandler(404)
    @user_login_data
    def page_not_fount(e):
        user = g.user
        data = {"user": user.to_dict() if user else None}
        return render_template('news/404.html', data=data)
        
    @app.after_request
    def after_request(response):
        csrf_token = generate_csrf()
        response.set_cookie("csrf_token",csrf_token)
        return response
    
    from info.modules.index import index_blue
    app.register_blueprint(index_blue)
    from info.modules.passport import passport_blue
    app.register_blueprint(passport_blue)
    from info.modules.news import news_blue
    app.register_blueprint(news_blue)
    from info.modules.user import user_blue
    app.register_blueprint(user_blue)
    from info.modules.admin import  admin_blue
    app.register_blueprint(admin_blue)

    @app.errorhandler(404)
    @user_login_data
    def page_not_found(_):
        user = g.user
        data = {"user_info": user.to_dict() if user else None}
        return render_template('news/404.html', data=data)
        return app
    
    return app
